I'll give you a question, please answer with step-by-step reasoning process. What happens if someone kisses too long?
Options:
- strong feelings
- herpes
- shortness of breath
- excitement
- arousal

Shortness of breath happens due to the build-up of carbon dioxide in the body. As carbon dioxide levels accumulate in the body from exercise, it triggers us to breathe more rapidly. Shortness of breath happens if someone kisses too long.
The answer: shortness of breath.